let obj={
    //属性yu部署了getter读取函数
    get yu(){
      //this返回的是Reflect.get的receiver参数对象
      return this.name+this.age
    }
  }

  let receiver={
    name:"shen",
    age:"18",
  }
  
  let result=Reflect.get(obj,"yu",receiver)
  console.log(result)